Arcing the battery

[ctferguson71]

I have a 2018 GMC 2500hd Sierra, 6.0 liter and i installed a power harness to the truck battery for my fisher plow.  After installing the power harness, it was to short and started to remove the harness for a longer fisher plow power harness.  When i was taking the leads off the truck battery, my wrench slipped off the negative side of the battery and hit the positive side and a good arc happened.  I didn't think to much about it but later that evening, i went to lock the truck with the remote and the horn does not peep when you try to lock the truck.  Also and more importantly, when i put the keys into the ignition, my dash lights will not even come on, the truck will not start.  The truck lights come on fully when i unlock the truck with the remote but have no power to the dash.  The radio will not even turn on. I tested the battery and i get 12.75 volts so the battery is good.  Can you blow a fuse by arcing the battery?  I've read other posts that say to look at the PCM, what is the PCM?

 

Does anyone have any idea on what is the culprit?    

[riverbanks]

Pcm, engine brain,I would test main fuses

[BlancoSilverado]

To piggy back from @riverbanks, i would disconnect the battery and allow the truck to drain the capacitors(15-25mins so wait 30mins). while its draining, check all the fuses, father-in-law did this on a 2001 suburban and it fried the main fuse and a few of the 40amp fuses (that is why you want to check all of them).

[Joshua Ness]

Get a 12v test light probe, attach to a ground, and check every single fuse you can find.